Sol–gel derived porous hydroxyapatite coatings

  • WENJIAN Weng
  • J. L Baptista


The preparation of hydroxyapatite coatings on alumina substrates by a sol–gel method was investigated. A mixed ethanol solution of Ca(NO3)2·4H2O and P2O5 was used as a dipping source. The samples were characterized by solid-state 31P nuclear magnetic resonance spectroscopy, differential thermal analysis, thermogravimetry, X-ray diffraction, scanning electron microscopy and infrared reflection spectroscopy. The coating obtained at 500°C had good hydroxyapatite crystallinity, adhesive strength of about 10 MPa and dense morphology. The coating obtained at 750°C also had good crystallinity and adhesive strength but porous morphology. © 1998 Chapman & Hall


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Copyright information

© Chapman and Hall 1998

Authors and Affiliations

  • WENJIAN Weng
    • 1
  • J. L Baptista
    • 2
  1. 1.Department of Materials Science and EngineeringZhejiang UniversityHangzhouPeople's Republic of China
  2. 2.Department of Ceramics and Glass EngineeringUniversity of AveiroAveiroPortugal

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